Tire.



D. W. JONES.

TIRE.

APPLICATION PILE D'DBG.8,1905.

Patented Jan. 18, 1910.

Y portion having and, at the same time,

Unrrnn es prima.

DAVID W. JONES, 0F TAUNTN, MASSACHUSETTS.

To all whom it lmay concern:

Be it. known that I, DAVID W. JONES, a citi-A zen of the United States,residing in Taunton, in the county of Bristol and State ofMassachusetts, ment in Tires, of which the following ldescriptiominconnection with the accompanying drawings, is a specification, likeletters on the drawings representinglike parts.

The present invention relates to a tire, the purpose of the inventionbeing to combine the Aadvantages of a pneumatic tire Wit-h those of asolid tire by preserving the greater part ofthe resiliency afforded by apneumatic tire,

entirely obviating the liability of punctures.

To these ends, the tire embodying the in vention consists in a pneumatictube which may be of any suitable or usual construction, combined with atread portion, the major part of which is preferably of some resilientmaterial, such as solid rubber, the said tread a convex innerAsupporting surface arranged to iit over the pneumatic tube and 'be heldin position by the air pressure When the pneumatic tube is inflated.This convex inner portion is preferably of a material different fromthat of the tread portion proper, and may conveniently be made Vofcomparatively thin sheet metal to which the tread portion is attachedbyv suitable clamping devices.

The convex inner portion l may further be provided With transverseprojections or ridges which project into the outer surface .of thepneumatic tube so as to prevent any longitudinal movement or creeping ofthe tread portion with relation to the pneumatic portion of the tire.The tread portion may be secured lto the metal portion by means ofannular clamping members which are held in place by bolts extendingtransversely through said members and the tread ortion, it beingpracticable to locate the bo ts Where the transverse projections areformed in the metal part.

Figure l is a side kelevation of a portion of -a Wheel rim equipped Witha tire embodying the invention; and Fig. 2-is a transverse section ofthe same.

,The pneumatic portion of the tire which may be of any suitable or usualconstruction is herein shown as provided for by 'means of an inner tubea and an outer cover a?, shown .as of the Well-known position in the rimclencher type, held in b by the air pressure when the tube'a is inated.The tread porhave invented an Improve' serial no. ascesi.

.edges so as to hold-the said clamping members firmly in position. Theclamping members d are held together by vmeans of bolts d3 which extendtransversely through the tw( clamping members at opposite sides, andalso Specification of Letters Patent. Patented Jam, 18, lgl. Y'Application filed December 8, 1905.

throughthe tread portion c, the part e being shown as provided withchannels or depres- ,sions e3 Where the bolts pass throughthe' outertread portion. These channels or depressions a-i'ord seats for thebolts, and, at

thesame time, constitute inward projections Which depress and engage thepneumatic portion of the tire -so as to prevent any longitudinalmovement of the tread portion with relation to the pneumatic portion.The clamping bolts d3 are provided Wit-l1 nuts d* by means of which thetwo clamping members d are drawn firmly into engagement with the treadportion c, so as to hold the same snugly in position. t

' To apply the tread portion to the pneumatic portion, the latter isdeated and flat-` tened, so that the said tread portion' can be pushedlaterally into place Where it. is irinly held by the air pressure whenthe tire has been inflated. The comparatively thick tread portion,combined with the metallic seat, renders it practically impossible topuncture the tire, and the tread portion, if A made of suitablematerial, such as rubber of good lqualit-y, affords lsuflicientresiliency to take care of the minor projections or irregularities inthe road surface, While the load is practically supported upon an aircushion, as is the case with the ordinary pneumatic tire. t

Generally speaking, the main feature of novelty in the tread portionconsists in the concave seat which fits over the pneumatic portion ofthe tire, it being obvious that the construction of the tread portionmay be widely varied Without departing from the invention. The saidtread portion is herein illustrated as consisting of Separate blocks ofsuitable materia-l,r preferably rubber, each block being held inposition by means of one of the clamping bolts d3. This construction hasthe advantage that, .in the case of a deep cut or other injury to anypart o the tread, the injured block can be removed and anothersubstituted Without destroying the entire tread portion. Furthermore, itis not, of course, essential that the tread portion should be of rubber,since other materials might be substituted, the pneumatic portion of thetire being mainly relied upon for the resiliency ot' the tire as aWhole, It is, hoW ever, practicable, if desired, to provide the tirewith a continuous endless tread portion of solid rubber which can bestretched into place upon the pneumatic portion or the supportingportion, such construction being indicated by the dotted lines in Fig.l.

It is not intended to limit the invention to the specific constructionand arrangementof the tread portion herein shown, or to the specifiedmaterial or materials composing the said tread portion,

since modifications may obviously be made Without departing from theinvention.

Claim.

In a tire, the combination with a pneumatic tube; of a concave annularmember of sheet metal fitting' over and conforming to the outer surfaceof said tube; a tread p0rtion seated on said annular member; transversechannels shaped in said annular member, the under sides of whichchannels form projections to engage the surface of the pneumatic tube;annular clamping members; and clamping bolts extending through saidclamping members and said tread portion, and seated in said transversechannels,v substantially as described.

In testimony whereof, I have signed my name to this specification in thepresence of two subscribing witnesses.

DAVID W. JoNEs.

Witnesses:

HARRY WV. FAY, EDWARD G., HALL.

